⚡ Make it possible to set tunnel subdomain via environment variable

packages/cli/commands/start.ts

@@ -1,5 +1,6 @@
 import * as localtunnel from 'localtunnel';
 import {
+	TUNNEL_SUBDOMAIN_ENV,
 	UserSettings,
 } from "n8n-core";
 import { Command, flags } from '@oclif/command';
@@ -14,8 +15,8 @@ import {
 	GenericHelpers,
 	LoadNodesAndCredentials,
 	NodeTypes,
-	TestWebhooks,
 	Server,
+	TestWebhooks,
 } from "../src";
 
 const tunnel = promisify(localtunnel);
@@ -120,7 +121,14 @@ export class Start extends Command {
 				if (flags.tunnel === true) {
 					this.log('\nWaiting for tunnel ...');
 
-					if (userSettings.tunnelSubdomain === undefined) {
+					let tunnelSubdomain;
+					if (process.env[TUNNEL_SUBDOMAIN_ENV] !== undefined && process.env[TUNNEL_SUBDOMAIN_ENV] !== '') {
+						tunnelSubdomain = process.env[TUNNEL_SUBDOMAIN_ENV];
+					} else if (userSettings.tunnelSubdomain !== undefined) {
+						tunnelSubdomain = userSettings.tunnelSubdomain;
+					}
+
+					if (tunnelSubdomain === undefined) {
 						// When no tunnel subdomain did exist yet create a new random one
 						const availableCharacters = 'abcdefghijklmnopqrstuvwxyz0123456789';
 						userSettings.tunnelSubdomain = Array.from({ length: 24 }).map(() => {
@@ -132,7 +140,7 @@ export class Start extends Command {
 
 					const tunnelSettings: localtunnel.TunnelConfig = {
 						host: 'https://hooks.n8n.cloud',
-						subdomain: userSettings.tunnelSubdomain,
+						subdomain: tunnelSubdomain,
 					};
 
 					const port = config.get('port') as number;